Soft Earplugs, Set of 5 Pairs (10 Pieces), Green Lowest Price Noise Reduction Rating: 35.5~40dB Diameter: 13mm Length: 23mm ★ 10 pairs (20 pieces) set for 500 yen, 15 pairs (30 pieces) set for 666 yen. Bulk discounts available for large orders. If interested, tap the seller K-TURN to select the discounted items or let me know in the comments. ★ Sets with other 300-yen items such as smartphone finger sleeves and conductive fiber touch pens are also available: 2 items for 500 yen, 3 items for 666 yen. If you'd like to purchase a set, please request a combined purchase or consult in the comments. Comfortable soft material Polyurethane Slow rebound Noise reduction For studying, swimming, sleeping, construction sites, professional use, industrial use As shown in the photo, 5 pieces are packed in a bag. Slow rebound type, so compress and insert into your ear. It will slowly expand and seal your ear. If you don't want your address to be known, I can change to anonymous shipping for an additional 90 yen. Please let me know in the comments. Thank you. Earplugs Household goods Daily necessities Green 5 pairs 10 pieces